The EDP Sciences Flexible Maths Journals Package is a four-journal online package made up of one mandatory title: ESAIM: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN), and a choice of three other maths titles from their portfolio, for a fixed, discounted price. All six titles will be published under the Subscribe to Open (S2O) model for 2021 and there will be no fees to publish in the journals. In addition to S2O, EDP Sciences is offering a green compliant option for all funded authors to ensure that authors can comply with funder mandates in the event of a journal not reaching the threshold set for the content to be opened up in any given year.